Improvement in gates



waited, iatta Leners Pezem Ne. 91,677, dated 'June 22, 1869.

:Mainova-:Meur 1N .'GATES.

AI 'lie Schedule referred f to in these Letters Patentv and making part of the same To all whom it 4ma/y concern:

Be it known that I, L. W. SIBLEY, of Ames, inthe 'county of Story, and State of Iowa, have invented a new and useful Improvement in Grat-es;l and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled inthe art to make and use the saine, reference being had to the accompanying drawing, forming 'part of this specification, in which e Figure l is a detail sectional view of my improved gate, taken through the line x-x, iig. 2.

`Figure 2 is a top or plan View of the same.

Figure 3 is a detail view, showing the hinge.

Similar lettersof reference indicate corresponding parts. y

My invention has for its object to furnish animproved gate, which shall be so constructed and arranged that it may be opened by the advancing, and closed by the departing wagon; and i It consists in the construction and combination of the various parts, by means of which the gate is operated, as hereinafter more fully described.

A represents the gate; B, therear gate-130%; C, the front gate-post about the construction of which parts there is nothing new.

The gate A is hinged to the post B by means of, eyebolts D, attached to the rear vertical bar of the gate, and long staples E, attached to the post B, as shown in ng. 3.

F is a circular rail or track, made upon the arc of a circle, having its centre in -the axis of the gate.

The track F is formed solidly upon, or securely and rigidly attached to the arms of a U-shaped bar, G, the centre of which is swivelled to the forward side of the lower part of the post D, by means of 'a' headed projection, pin, or bolt formed upon or attached to the outer side of the centre of the said U-shapedbar G, which enters a socket formed in the said post B for its reception.

For convenience in inserting and detaching the track F G, aslot may be formed, leading upward from said socket, and widened at its upper end, so as to admit the head of said bolt, pin, or projection.

rlibe ends of the arms of the U-shaped bolt G rest upon pivots, the points of which enter socketsin' said arms, and which are placed equally distant from the centre of the circular track F.

H is a grooved wheel or pulley, pivoted to the lower part of' the gate A, in such a position as -to rest upon the track F, and roll along said track as the gate is swung open and shut. l

'lo the ends of the curved track F are attached thc ends of two ropes, or chains I, which pass beneath and Y aroundl grooved pulleys J, pivoted to suitable supports in a' channel beneath the gate.V The. ropes or chains I cross each other beneath the gate, and extend out for a suiicient distance upon the opposite sides of said gate.` Y' Y The outer ends of the'chans I are branched, and the ends of the branches are attached, the one to the upper side, and the other to the lower side of the eccentric wheels, or pulleys K, which may be grooved partly or wholly around their faces, and which are rig-l idly attached to the shafts I, which extend out Ahorizontally with the surfaceof the ground, and upon the ends of which are formed cranks M.

- The eccentric pulleys K and cranks M should beso arranged that the longer radius ofthe said pulleys K and the crank-arms M should be directly opposite to each other, as shown in g. l, so that the weight of the pulleys K, when left free to act, may always raise the cranks M into a vertical position. By this construction, as the wagon or other vehicle approaches the gate, the wheel strikes the upwardly-projecting crank M, and forces it down towards the gate, which depresses the further end, and elevates the nearer end of the track F.

The first effect of this movement is to raise the gate. and unlatch it. The weight of the gate then Causes the wheel H to roll down the inclinedtrackEswinging the gate open inthe direction from the advancing vehicle, the weight of the gate holding the track in clined after the wheel hasleft the crank M.

As the vehicle passes through the gate, its wheel strikes the other crank M, and forces it down in a di rection from the said gate.

This movement of the crank M brings the track F back into its former position, so that the gate, by its own weight, will swing shut, latching itself.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is

1. The curved tilting track F G, constructed and operating substantially as herein shown and described, and for the purpose set forth.

2. The combination -of the grooved Wheel H, tilting track F Gf, ropes or chains I, pulleys or wheels J, eccentric wheels K, and cranks M, with each other and with the gatewA, substantially as herein shown and described, and for the purposes set forth.

L. W. SIBLEY.

Witnesses:

W. M. GnnaLnY, BnNJ. BRENEMAN. 

